Stock internal 318 redline??

I've got a 74' Duster with the original 318 that's had the top end replaced with mostly eddy performance parts, (alum. 4 bar intake w/600 cfm carb) along with hedman shorty headers and most importantly, an aftermarket cam *unknown lift/duration, I assume similar specs to a 340/360 cam* Other than that it's completely stock from the heads down. Car has 3.55 gears if that makes a difference-

Anyone know where the redline would be?

-Car likes to naturally shift at 4700 from 2nd into 3rd with the kickdown properly adjusted, but it feels like the powerband can go a ways further still.
What does it rev to? We can't tell you from here.